Motor是一个适用于PythonTornado 应用，功能完整，非阻塞的 MongoDB 驱动器。Motor 封装自 PyMongo。

from tornado import gen    class NewMessageHandler(tornado.web.RequestHandler):      @tornado.web.asynchronous      @gen.coroutine      def post(self):          """Insert a message."""          msg = self.get_argument('msg')          db = self.settings['db']            # insert() returns a Future. Yield the Future to get the result.          result = yield db.messages.insert({'msg': msg})            # Success          self.redirect('/')      class MessagesHandler(tornado.web.RequestHandler):      @tornado.web.asynchronous      @gen.coroutine      def get(self):          """Display all messages."""          self.write('<a href="/compose">Compose a message</a><br>')          self.write('<ul>')          db = self.settings['db']          cursor = db.messages.find().sort([('_id', -1)])          while (yield cursor.fetch_next):              message = cursor.next_object()              self.write('<li>%s</li>' % message['msg'])            # Iteration complete          self.write('</ul>')          self.finish()

项目主页：http://www.open-open.com/lib/view/home/1397782973046